I have sle lupus and unstable angina,recently having discomfort in my back almost 2months now also feels like a cold draft.any idea what it can be?

Would need more info: Even with Lupus, unstable angina in a 36 year old is extremely unlikely but if true implies a serious disorder in lipid metabolism, obesity, or an extremely self-destructive lifestyle. If your primary care provider cant sort thru your very complicated history and presentation then you should definitely visit both a rheumatologist and a cardiologist and keep an open mind to what they have to say

Pain: Probably arthritic pain associated with your lupus and unlikely from your unstable angina. Good ,luck